Military action
Not officially considered to be a crusade, the "fourth crusade" was called by the Emperor and caused petty squabbles to break out amongst the lords of the Ütherreich.
This is by far the least effective crusade, and in fact it is hardly officially recognized as a crusade outside of the Ütherreich, and is technically still ongoing. Petty squabbles began to break out between the different lords when talk of a fourth crusade began to spread. Rather than launching any attacks against the Braccian League or even the Dwarves, this resulted in internal conflicts raging from trade wars to actual skirmishes fought between lords within The Divine Ütherreich. Imperial troops serving the Emperor directly can be found all across the empire attempting to intervene in these disputes, but often getting overwhelmed and destroyed instead.